/*
	@Author: 请叫我马哥
	@Time: 2017-04
	@Tittle: tab
	@Description: 点击对应按钮添加新窗口
*/
var tabFilter, menu = [];
layui.define(["element", "jquery"], function (exports) {
    var element = layui.element,
        $ = layui.jquery,
        layId,
        Tab = function () {
            this.tabConfig = {
                closed: true,
                openTabNum: undefined,  //最大可打开窗口数量
                tabFilter: "bodyTab",  //添加窗口的filter
                url: undefined  //获取菜单json地址
            }
        };

    //获取二级菜单数据
    Tab.prototype.render = function () {
        var url = this.tabConfig.url;
        $.get(url, function (data) {
            //显示左侧菜单
            if ($(".navBar").html() == '') {
                var _this = this;
                $(".navBar").html(navBar(data)).height($(window).height() - 245);
                element.init();  //初始化页面元素
                $(window).resize(function () {
                    $(".navBar").height($(window).height() - 245);
                })
            }
        })
    }

    //参数设置
    Tab.prototype.set = function (option) {
        var _this = this;
        $.extend(true, _this.tabConfig, option);
        return _this;
    };

    //通过title获取lay-id
    Tab.prototype.getLayId = function (title) {
        $(".layui-tab-title.top_tab li").each(function () {
            if ($(this).find("cite").text() == title) {
                layId = $(this).attr("lay-id");
            }
        })
        return layId;
    }
    //通过title判断tab是否存在
    Tab.prototype.hasTab = function (title) {
        var tabIndex = -1;
        $(".layui-tab-title.top_tab li").each(function () {
            if ($(this).find("cite").text() == title) {
                tabIndex = 1;
            }
        })
        return tabIndex;
    }

    //右侧内容tab操作
    var tabIdIndex = 0;
    Tab.prototype.tabAdd = function (_this) {
        var that = this;
        var closed = that.tabConfig.closed,
            openTabNum = that.tabConfig.openTabNum;
        tabFilter = that.tabConfig.tabFilter;
        if (_this.attr("target") == "_blank") {
            window.location.href = _this.attr("data-url");
        } else {
            var title = '';
            if (_this.find("i.iconfont,i.layui-icon").attr("data-icon") != undefined) {
                if (_this.find("i.iconfont").attr("data-icon") != undefined) {
                    title += '<i class="iconfont ' + _this.find("i.iconfont").attr("data-icon") + '"></i>';
                } else {
                    title += '<i class="layui-icon">' + _this.find("i.layui-icon").attr("data-icon") + '</i>';
                }
            }
            //已打开的窗口中不存在
            if (that.hasTab(_this.find("cite").text()) == -1 && _this.siblings("dl.layui-nav-child").length == 0) {
                if ($(".layui-tab-title.top_tab li").length == openTabNum) {
                    layer.msg('只能同时打开' + openTabNum + '个选项卡哦。不然系统会卡的！');
                    return;
                }
                tabIdIndex++;
                title += '<cite>' + _this.find("cite").text() + '</cite>';
                title += '<i class="layui-icon layui-unselect layui-tab-close" data-id="' + tabIdIndex + '">&#x1006;</i>';
                element.tabAdd(tabFilter, {
                    title: title,
                    content: "<iframe src='" + _this.attr("data-url") + "' data-id='" + tabIdIndex + "' class='mframe' frameborder='no' scrolling='auto'></frame>",
                    id: new Date().getTime()
                })
                //当前窗口内容
                var curmenu = {
                    "icon": _this.find("i.iconfont").attr("data-icon") != undefined ? _this.find("i.iconfont").attr("data-icon") : _this.find("i.layui-icon").attr("data-icon"),
                    "title": _this.find("cite").text(),
                    "href": _this.attr("data-url"),
                    "layId": new Date().getTime()
                }
                element.tabChange(tabFilter, that.getLayId(_this.find("cite").text()));
                that.tabMove(); //顶部窗口是否可滚动
            } else {
                //当前窗口内容
                var curmenu = {
                    "icon": _this.find("i.iconfont").attr("data-icon") != undefined ? _this.find("i.iconfont").attr("data-icon") : _this.find("i.layui-icon").attr("data-icon"),
                    "title": _this.find("cite").text(),
                    "href": _this.attr("data-url")
                }
                element.tabChange(tabFilter, that.getLayId(_this.find("cite").text()));
                that.tabMove(); //顶部窗口是否可滚动
            }
        }
    }

    //顶部窗口移动
    Tab.prototype.tabMove = function () {
        $(window).on("resize", function () {
            var topTabsBox = $("#top_tabs_box"),
                topTabsBoxWidth = $("#top_tabs_box").width(),
                topTabs = $("#top_tabs"),
                topTabsWidth = $("#top_tabs").width(),
                tabLi = topTabs.find("li.layui-this"),
                top_tabs = document.getElementById("top_tabs");
            ;

            if (topTabsWidth > topTabsBoxWidth) {
                if (tabLi.position().left > topTabsBoxWidth || tabLi.position().left + topTabsBoxWidth > topTabsWidth) {
                    topTabs.css("left", topTabsBoxWidth - topTabsWidth);
                } else {
                    topTabs.css("left", -tabLi.position().left);
                }
                //拖动效果
                var flag = false;
                var cur = {
                    x: 0,
                    y: 0
                }
                var nx, dx, x;

                function down() {
                    flag = true;
                    var touch;
                    if (event.touches) {
                        touch = event.touches[0];
                    } else {
                        touch = event;
                    }
                    cur.x = touch.clientX;
                    dx = top_tabs.offsetLeft;
                }

                function move() {
                    var self = this;
                    window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
                    if (flag) {
                        var touch;
                        if (event.touches) {
                            touch = event.touches[0];
                        } else {
                            touch = event;
                        }
                        nx = touch.clientX - cur.x;
                        x = dx + nx;
                        if (x > 0) {
                            x = 0;
                        } else {
                            if (x < topTabsBoxWidth - topTabsWidth) {
                                x = topTabsBoxWidth - topTabsWidth;
                            } else {
                                x = dx + nx;
                            }
                        }
                        top_tabs.style.left = x + "px";
                        //阻止页面的滑动默认事件
                        document.addEventListener("touchmove", function () {
                            event.preventDefault();
                        }, false);
                    }
                }

                //鼠标释放时候的函数
                function end() {
                    flag = false;
                }

                //pc端拖动效果
                topTabs.on("mousedown", down);
                topTabs.on("mousemove", move);
                $(document).on("mouseup", end);
                //移动端拖动效果
                topTabs.on("touchstart", down);
                topTabs.on("touchmove", move);
                topTabs.on("touchend", end);
            } else {
                //移除pc端拖动效果
                topTabs.off("mousedown", down);
                topTabs.off("mousemove", move);
                topTabs.off("mouseup", end);
                //移除移动端拖动效果
                topTabs.off("touchstart", down);
                topTabs.off("touchmove", move);
                topTabs.off("touchend", end);
                topTabs.removeAttr("style");
                return false;
            }
        }).resize();
    }

    $("body").on("click", ".top_tab li", function () {
        //切换后获取当前窗口的内容
        element.tabChange(tabFilter, $(this).attr("lay-id")).init();
    })

    //删除tab
    $("body").on("click", ".top_tab li i.layui-tab-close", function () {
        element.tabDelete("bodyTab", $(this).parent("li").attr("lay-id")).init();
        new Tab().tabMove();
    })

    var bodyTab = new Tab();
    exports("bodyTab", function (option) {
        return bodyTab.set(option);
    });
})